Definition of Planet 1. (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction Noun 2. A person who follows or serves another Noun 3. Any celestial body (other than comets or satellites) that revolves around a star Noun Synonyms for word "planet" Semanticaly linked words with "planet" Hyponims for word "planet" Lexical Analysis for "planet" planetal of or relating to or resembling the physical or orbital characteristics of a planet or the planets of or relating to or resembling the physical or orbital characteristics of a planet or the planets planetary of or relating to or resembling the physical or orbital characteristics of a planet or the planets etymology multiplanet etymology planetdom etymology planeteer etymology planetless etymology planetlike etymology planetscape etymology planetside etymology planetward etymology planetwide etymology superplanet etymologically related gas giant etymologically related ice giant etymologically related planetary object etymologically related sub-brown dwarf etymological origin of planete is derived from Planet Earth is derived from carbide planet is derived from carbon planet is derived from diamond planet is derived from dual planet is derived from dwarf planet is derived from exoplanet is derived from extrasolar planet is derived from free-floating planet is derived from gas giant planet is derived from giant planet is derived from ice giant planet is derived from inner planet is derived from interstellar planet is derived from major planet is derived from mesoplanet is derived from minor planet is derived from outer planet is derived from planemo is derived from planetar is derived from planetarium is derived from planetary is derived from planetary-mass object is derived from planetesimal is derived from planetoid is derived from planets is derived from satellite planet is derived from silicate planet is derived from silicon planet is derived from supergiant planet is derived from superplanet is derived from terrestrial planet is derived from water planet